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ClinicalTrials.gov public records Last synced Nov 15, 2026, 6:45 AM EST

All trial information on this site comes from the official ClinicalTrials.gov public API (clinicaltrials.gov/api/v2), run by the U.S. National Library of Medicine. We only display that public information; we do not add opinions, endorsements, or any other intent. Always review the official ClinicalTrials.gov record for the latest information.

Showing 97–120 of 967 matching trials from the live ClinicalTrials.gov search.

Filters: Intervention: Vitamin D3 . Clear all

Conditions: Vitamin D Deficiency
Interventions: Cholecalciferol; Drug
Lead sponsor: Parkview Medical Center; Other
Eligibility: 18 Years to 75 Years
Enrollment: 60 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2019 – 2021
U.S. locations: 1
States / cities: Pueblo, Colorado

Conditions: Female Sexual Dysfunction, Polycystic Ovary Syndrome
Interventions: Vitamin D, Hormonal contraception; Dietary Supplement · Drug
Lead sponsor: Wright State University; Other
Eligibility: 18 Years to 40 Years · Female only
Enrollment: 47 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2017 – 2020
U.S. locations: 2
States / cities: Dayton, Ohio • Hershey, Pennsylvania

Conditions: Hematological Malignancies
Interventions: Ibandronate, Vitamin Supplements; Drug
Lead sponsor: M.D. Anderson Cancer Center; Other
Eligibility: 18 Years and older
Enrollment: 78 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2017
U.S. locations: 1
States / cities: Houston, Texas

Conditions: Vitamin D Deficiency
Interventions: Treatment; Drug
Lead sponsor: Johns Hopkins All Children's Hospital; Other
Eligibility: 36 Months to 18 Years
Enrollment: 26 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2016 – 2019
U.S. locations: 1
States / cities: St. Petersburg, Florida

Conditions: Hypertension
Interventions: Vitamin D, calcitriol, Placebo; Drug
Lead sponsor: Atlanta VA Medical Center; Federal
Eligibility: 18 Years to 80 Years
Healthy volunteers: Accepts healthy volunteers
Timeline: 2007 – 2011
U.S. locations: 1
States / cities: Decatur, Georgia

Conditions: Vitamin D Deficiency, HIV
Interventions: Vitamin D; Dietary Supplement
Lead sponsor: University of California, Los Angeles; Other
Eligibility: 18 Years to 90 Years
Enrollment: 122 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2012
U.S. locations: 1
States / cities: Los Angeles, California

Conditions: Wheezing, Allergy
Interventions: Cholecalciferol, Cholecalciferol; Dietary Supplement · Drug
Lead sponsor: Case Western Reserve University; Other
Eligibility: Up to 1 Year
Enrollment: 300 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2017
U.S. locations: 5
States / cities: New York, New York • Cleveland, Ohio • Charleston, South Carolina

Conditions: Non Small Cell Lung Cancer
Interventions: Calcitriol; Drug
Lead sponsor: University of Michigan Rogel Cancer Center; Other
Eligibility: 18 Years and older
Enrollment: 34 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2008 – 2013
U.S. locations: 4
States / cities: Ann Arbor, Michigan • Buffalo, New York

Conditions: Insulin Sensitivity, Flow-mediated Dilation, Arterial Stiffness
Interventions: Not listed
Lead sponsor: University of Alabama at Birmingham; Other
Eligibility: 19 Years to 60 Years
Enrollment: 63 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2009 – 2013
U.S. locations: 1
States / cities: Birmingham, Alabama

Conditions: Hepatitis C Infection, Vitamin D Deficiency
Interventions: Vitamin D, Placebo; Drug
Lead sponsor: Veterans Medical Research Foundation; Other
Eligibility: 18 Years and older
Enrollment: 24 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2011 – 2014
U.S. locations: 1
States / cities: La Jolla, California

Conditions: Renal Osteodystrophy
Interventions: doxercalciferol, Cholecalciferol; Drug
Lead sponsor: Indiana University; Other
Eligibility: 18 Years to 82 Years
Enrollment: 55 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2009
U.S. locations: 1
States / cities: Indianapolis, Indiana

Conditions: Fractures
Interventions: Vitamin D3 placebo, Fish oil placebo, omega-3 fatty acids (fish oil), Vitamin D3; Dietary Supplement · Drug
Lead sponsor: Brigham and Women's Hospital; Other
Eligibility: 50 Years and older
Enrollment: 25,871 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2018 – 2022
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Chronic Kidney Disease
Interventions: 1000 IU of Vitamin D3, 4000 IU of Vitamin D3; Drug
Lead sponsor: Emory University; Other
Eligibility: 9 Years to 21 Years
Enrollment: 98 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2014
U.S. locations: 1
States / cities: Atlanta, Georgia

Conditions: Healthy Volunteers
Interventions: Single High Dose Cholecalciferol, Daily Dose Cholecalciferol; Dietary Supplement
Lead sponsor: Mayo Clinic; Other
Eligibility: 18 Years to 40 Years · Female only
Enrollment: 40 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2010
U.S. locations: 1
States / cities: Rochester, Minnesota

Conditions: Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions: Paricalcitol, Calcitriol; Drug
Lead sponsor: Washington University School of Medicine; Other
Eligibility: 18 Years and older
Enrollment: 110 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2009 – 2013
U.S. locations: 4
States / cities: Chicago, Illinois • Evanston, Illinois • Detroit, Michigan + 1 more

Conditions: Vitamin D Deficiency
Interventions: vitamin D, Placebo; Dietary Supplement · Other
Lead sponsor: Northwestern University; Other
Eligibility: 18 Years to 47 Years · Female only
Enrollment: 67 participants
Healthy volunteers: Accepts healthy volunteers
Timeline: 2009 – 2010
U.S. locations: 1
States / cities: Chicago, Illinois

Conditions: Secondary Hyperparathyroidism Due to Renal Causes, Vitamin D Insufficiency, CKD Stage 3, CKD Stage 4
Interventions: Calcifediol Oral Capsule, Calcifediol Oral Product, Cholecalciferol, Paricalcitol Oral Capsule; Drug
Lead sponsor: OPKO Health, Inc.; Industry
Eligibility: 18 Years and older
Enrollment: 69 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018 – 2020
U.S. locations: 3
States / cities: Garden Grove, California • Chicago, Illinois • West Bend, Wisconsin

Conditions: Knee Osteoarthritis
Interventions: Vitamin D, Control; Drug
Lead sponsor: Rush University Medical Center; Other
Eligibility: 18 Years to 80 Years
Enrollment: 137 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2022
U.S. locations: 1
States / cities: Chicago, Illinois

Conditions: Diabetes, Depression, Quality of Life
Interventions: Vitamin D3, Vitamin D3 comparator; Drug
Lead sponsor: Loyola University; Other
Eligibility: 21 Years and older · Female only
Enrollment: 265 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2018
U.S. locations: 1
States / cities: Maywood, Illinois

Conditions: Migraine
Interventions: Simvastatin, Vitamin D, Placebo; Drug · Dietary Supplement · Other
Lead sponsor: Rami Burstein; Other
Eligibility: 18 Years and older
Enrollment: 89 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2010 – 2015
U.S. locations: 1
States / cities: Boston, Massachusetts

Conditions: Hypoparathyroidism
Interventions: Synthetic Human Parathyroid Hormone 1-34, Calcitriol & Calcium; Drug
Lead sponsor: Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD); NIH
Eligibility: 17 Years to 69 Years
Enrollment: 27 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 1991 – 2014
U.S. locations: 1
States / cities: Bethesda, Maryland

Conditions: Psoriasis
Interventions: Calcipotriene 0.005% Foam; Drug
Lead sponsor: Mayne Pharma International Pty Ltd; Industry
Eligibility: 2 Years to 11 Years
Enrollment: 36 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2013 – 2018
U.S. locations: 36
States / cities: Birmingham, Alabama • Rogers, Arkansas • Encino, California + 30 more

Conditions: Colorectal Adenomatous Polyps
Interventions: Rectal biopsy during colonoscopy, Rectal biopsy at randomization, Rectal biopsy at 1 year, Rectal biopsy prior to colonoscopy, Biopsies during colonoscopy; Procedure
Lead sponsor: Emory University; Other
Eligibility: 45 Years to 75 Years
Enrollment: 264 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2006 – 2016
U.S. locations: 9
States / cities: Los Angeles, California • Denver, Colorado • Atlanta, Georgia + 6 more

Conditions: Postpartum Depression, Preterm Labor
Interventions: Mindfulness-based intervention (with a focus on self-compassion; MBSC), Vitamin D; Behavioral · Dietary Supplement
Lead sponsor: University of Idaho; Other
Eligibility: 18 Years to 50 Years · Female only
Enrollment: 500 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2027
U.S. locations: 1
States / cities: Coeur d'Alene, Idaho

Search by objective public record fields.

Treatment of Vitamin D Deficiency With Large Bolus Cholecalciferol

Evaluation of Vitamin D in Women With PCOS and Sexual Dysfunction

Prevention of Osteoporosis in Bone Marrow Transplantation (BMT) Patients

Safety, Efficacy, and Feasibility of High-dose Cholecalciferol in Pediatric Patients With Cystic Fibrosis

Vitamin D and Blood Pressure

Vitamin D in HIV-Infected Patients on HAART

Wheezing in Black Preterm Infants: Impact of Vitamin D Supplementation Strategy

Phase I/II Calcitriol in Lung Cancer

Vascular Function, Insulin Sensitivity, and Vitamin D

Effects of Vitamin D on Inflammation in Liver Disease

Cholecalciferol Versus Doxercalciferol in the Treatment of Secondary Hyperparathyroidism in Chronic Kidney Disease

VITamin D and OmegA-3 TriaL (VITAL): Fractures, Vitamin D and Genetic Markers

Two Vitamin D Dosing Strategies in Children With Chronic Kidney Disease

Pilot Pharmacokinetic Study of Daily Versus Monthly High-Dose Cholecalciferol Supplementation

Paricalcitol Versus Calcitriol for Efficacy and Safety in Stage 3/4 Chronic Kidney Disease (CKD) With Secondary Hyperparathyroidism (SHPT)

Comparison of 25-hydroxy Vitamin D Level in Caucasian Women Receiving Vitamin D Supplementation and Not Receiving Supplementation: a Randomized Controlled Trial.

Repeated-dose Safety, Efficacy, Pharmacokinetic and Pharmacodynamic of CTAP101, Immediate-release Calcifediol, High-dose Cholecalciferol, and Paricalcitol Plus Low-dose Cholecalciferol in Patients With Secondary Hyperparathyroidism, Chronic Kidney Disease 3-4 and Vitamin D Insufficiency

Evaluating Vitamin D3 Supplement on Post-Op Outcomes

Sunshine 2 Study for Women With Diabetes

Statin/Vitamin D & Migraine Study

Treatment of Hypoparathyroidism With Synthetic Human Parathyroid Hormone 1-34

Evaluate Safety and Tolerability of Calcipotriene Foam 0.005% in Pediatric Subjects With Mild/Moderate Plaque Psoriasis

Calcium/Vitamin D, Biomarkers & Colon Polyp Prevention

Maternal Stress on Human Milk and Infant Outcomes